Objective:To observe the clinical efficacy of Xiewu Capsule combined with Chuanxiong Pingchuan Mixture in the treatment of bronchial asthma in attack stage with syndrome of intermingled phlegm and blood stasis. Methods104 patients of bronchial asthma in attack stage with syndrome of intermingled phlegm and blood stasis were randomly divided into the treatment group and control group,52 cases in each group. The treatment group was treated with Xiewu Capsule combined with Chuanxiong Pingchuan Mixture,and the control group was treated with Compound Methoxyphenamine Capsules by oral administration and Budesonide Powder by inhalation,with a course of 7 days. The clinical efficacy was observed,and the changes on TCM syndrome score,pulmonary function indexes and related cytokines were compared.  Results:①The clinical total effective rates were 86.5% in the treatment group and 75.0% in the control group,and the clinical efficacy of the treatment group was significantly better than that of the control group (P,<,0.05). ②For the comparison between treatment before and after,there was statistically significant difference on TCM syndrome score in both groups (P,<,0.05). For the comparison of the difference between treatment before and after,there was statistically significant difference between the two groups,and the decrease of TCM syndrome score in the treatment group was significantly greater than that in the control group (P,<,0.05). ③For the comparison between treatment before and after,there were statistically significant differences on the levels of forced vital capacity (FVC),forced expiratory volume in first second (FEV,1,) and peak expiratory flow (PEF) in both groups (P,<,0.05). After treatment,there were statistically significant differences on the levels of FEV,1, and PEF between the two groups,and the improvement in the treatment group was significantly better than that in the control group (P,<,0.05),while there was no statistically significant difference on FVC level between the two groups (P,>,0.05). ④For the comparison between treatment before and after,there were statistically significant differences on the levels of serum interleukin-4 (IL-4) and interferon-γ (IFN-γ) in both groups (P,<,0.05). After treatment,there were no statistically significant differences on the levels of IL-4 and IFN-γ between the two groups (P,>,0.05).  Conclusion:Xiewu Capsule combined with Chuanxiong Pingchuan Mixture shows satisfactory efficacy in the treatment of bronchial asthma in attack stage with syndrome of intermingled phlegm and blood stasis,which can obviously alleviate the clinical symptoms and improve the pulmonary ventilation function in patients. Its mechanism may be related to correcting the imbalance of Th1/Th2 cell function.